This place is amazing. It's called "Dunas of Samalayuca". It is a Sahara desert right in the north of Mexico. Walking on the sand and looking at the big dunes is just mind-blowing. The challenge here is the wind blowing. You have to be very careful with your gear because the sand can get inside of your lenses. And then, you have a lot of light reflecting on the almost-white sand. Contemplating such a vast wonderful place makes you feel incredible small, as my brother-in-law does there in the picture. I took it with my canon 6D Mark II and my 35 mm.